DLH Executive and Leadership Team

Kathryn JohnBull, the President & Chief Executive Officer at DLH, directs the overarching corporate strategy and long-term vision for the organization. Overseeing the integration of technology-enabled business process outsourcing and public health research, the President & Chief Executive Officer ensures alignment with the complex requirements of federal clients like the National Institutes of Health. This leadership role involves driving growth through digital transformation initiatives, including artificial intelligence and cloud enablement. By fostering collaboration across all departments, Kathryn JohnBull maintains a focus on operational excellence and market expansion. The President & Chief Executive Officer also manages relationships with the Board to ensure fiscal health and strategic agility. Through consistent engagement with the Defense Health Agency and other key partners, JohnBull secures the company's position as a premier provider of mission-critical services within the United States federal landscape.

Steven Oroho, the Chief Financial Officer at DLH, manages the financial architecture and capital allocation strategies necessary for sustained corporate growth. Overseeing fiscal planning, reporting, and risk management, the Chief Financial Officer ensures the company maintains the robust economic foundation required to support large-scale federal contracts. This role involves optimizing resource distribution across cybersecurity and big data analytics divisions to maximize shareholder value. By implementing rigorous financial controls, Steven Oroho supports the organization's ability to scale operations for the US Navy and other defense entities. The Chief Financial Officer also collaborates with executive leadership to evaluate investment opportunities in emerging technologies like machine learning. Through precise financial modeling and strategic oversight, Oroho drives the long-term stability of the enterprise, ensuring that all business units possess the necessary capital to deliver high-impact public health research and program management solutions.

Diane Yarnell, the President, Health Information Technology at DLH, leads the development and deployment of digital transformation solutions for federal health clients. Overseeing the implementation of cloud enablement, cybersecurity ecosystems, and big data analytics, the President, Health Information Technology ensures that technical infrastructure supports critical mission requirements. This role involves managing large-scale IT projects that integrate artificial intelligence and machine learning into existing government workflows. By driving innovation within the health IT sector, Diane Yarnell enables the company to provide superior support to the Defense Health Agency and other key partners. The President, Health Information Technology also coordinates with cross-functional teams to ensure that all technological solutions remain secure and scalable. Through strategic oversight of the IT division, Yarnell maintains the company's competitive edge in the federal marketplace, delivering advanced digital tools that streamline business processes and enhance the effectiveness of public health research programs.

Fred Vago, the President at DLH, directs the operational execution of program management solutions and business process outsourcing across the organization. Overseeing the delivery of services to the US Navy Naval Information Warfare Center, the President ensures that all contractual obligations meet rigorous performance standards. This leadership role involves streamlining internal processes to improve efficiency and service delivery speed. By managing the day-to-day operations of key business units, Fred Vago supports the company's broader mission of providing high-quality support to federal agencies. The President also works closely with other executives to align operational capabilities with the company's strategic goals in cybersecurity and data analytics. Through the implementation of best practices in program management, Vago drives consistent results and fosters strong relationships with government clients. This focus on operational excellence ensures that the company remains a reliable partner for complex, technology-intensive projects throughout the United States.

Joseph Martin, the Chief Medical Officer, Dlh Corporate at DLH, provides clinical expertise and scientific guidance for all public health research and analytics initiatives. Overseeing the medical integrity of programs delivered to the National Institutes of Health, the Chief Medical Officer ensures that data-driven solutions meet the highest standards of clinical efficacy. This leadership role involves bridging the gap between complex medical research and actionable technology-enabled outcomes. By directing the application of modeling and simulation to health-related challenges, Joseph Martin enhances the company's ability to support the Tele-medicine and Advanced Technology Research Center. The Chief Medical Officer also advises the executive team on emerging trends in public health, ensuring that service offerings remain at the forefront of industry innovation. Through continuous engagement with scientific stakeholders, Martin validates the technical accuracy of all health-focused projects, ultimately improving the quality of care and operational efficiency for federal health agencies.